Improvement in door-locks



C. GUILD.

, DOOR-LOCK. No. 179,912, Patented .Tu1y18. 1876.

WITNESSES 0% 4M momma N4 PETERS. PHOYO-LWHOGRAPHER, WASHINGTON, D 0.

UNITED STATES PATET QE rcE.

CHARLES GUILD, OF PIEDMONT, WYOMING TERRITORY.

IMPROVEMENT IN DOOR-LOCKS.

Specification forming part of Letters Patent No. 179,912, dated July 18,1876; application filed March 13, 1876.

To all whom it may concern:

Be it known that I, CHARLES GUILD, of Piedmont, in the county of Uintaand Territory of Wyoming, have invented a new and Improved Look, ofwhich the .l'ollowing is a specification:

My invention relates to a lock having a series of vertically-slidingtumblers with beveled ends, the same being adapted to coincide with anotched rib attached to the bolt. It also relates to the construction ofthe key with removable interchangeable wards secured by a clamp, ashereinafter described and claimed.

Figure 1 is an inside elevation of my im proved lock. Fig. 2 is asectional elevation taken on line 00 w of Fig. 1. Fig. 3 is an elevationwith the inside plate removed. Fig. 4 is an elevation of one of thetumblers of the lock. Fig. 5 is a plan view of the he, and Fig. 6 is alongitudinal section of Fig. 5 on line y y. I

Similar letters of reference indicate corresponding parts.

A represents the notched rib of the bolt B. 0 represents thevertically-sliding gravitytumblers of the lock, which have a notch, l),in which the rib A may slide, and they are arranged in the notches E ofthe rib to be moved up by the key F, to set the notches of all thetumblers to coincide with the rib and to fall down when released, and sodisplace the notches that the bolt cannot be withdrawn.

The key acts horizontally against the beveled ends G of the tumblers toforce them up. It is constructed with wards H, one for each tumbler (3,so adjusted as to length that each ward of the key lifts its tumbler ofthe lock to the right position. The tumblers are beveled both ways forapplying the key from outside or inside. The combination is changed byraising the slide I of the case, and taking out the tumblers O andchanging them, and by taking out the block Jof the key and shifting itswards to correspond. This block is released by pressing down thespring-catch K. L is a key-hole cover to slide up over the keyhole andclose it, so as to prevent inserting a key from the outside.

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent- 1. The vertically-sliding tumblers O, having beveledends G, for being operated by a horizontally working key, substantiallyas specified.

2. The removable interchangeable wards H, in combination with thekey-shank F, the clamp-piece J, and spring-catch K, as shown anddescribed.

CHARLES GUILD. Witnesses:

ALF. G. LEE, WM. E. WHEELER.

